A rigid container holds 0.250 mol of an ideal gas at a pressure of 1.20 atm and a temperature of 300 K. The gas is heated to 360 K while the volume remains constant. What is the new pressure in atm?
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Correct answer
A. 1.44
Principle or equation
At constant volume, pressure is directly proportional to absolute temperature: P1/T1 = P2/T2.
Why this answer is correct
P2 = P1 × (T2/T1) = 1.20 atm × (360 K / 300 K) = 1.44 atm.
Example
If P1 = 2.00 atm, T1 = 300 K, T2 = 450 K, then P2 = 3.00 atm.
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